// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#pragma once

#include <memory>

#include <pollux/expression/vector_function.h>

namespace kumo::pollux::functions::sparksql {
    /// Supported Types:
    /// TINYINT
    /// SMALLINT
    /// INTEGER
    /// BIGINT
    /// HUGEINT
    /// REAL
    /// DOUBLE
    /// BOOLEAN
    /// VARCHAR
    /// TIMESTAMP

    /// Special cases:
    /// NaN in Spark is handled differently from standard floating point semantics.
    /// It is considered larger than any other numeric values. So Least/Greatest
    /// functions implement this order:
    /// -Inf < Inf < NaN

    std::shared_ptr<exec::VectorFunction> makeLeast(
        const std::string &name,
        const std::vector<exec::VectorFunctionArg> &inputArgs,
        const core::QueryConfig &config);

    std::vector<std::shared_ptr<exec::FunctionSignature> > leastSignatures();

    std::shared_ptr<exec::VectorFunction> makeGreatest(
        const std::string &name,
        const std::vector<exec::VectorFunctionArg> &inputArgs,
        const core::QueryConfig &config);

    std::vector<std::shared_ptr<exec::FunctionSignature> > greatestSignatures();
} // namespace kumo::pollux::functions::sparksql
